var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";  
    var base64DecodeChars = new Array(  
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,  
        52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,  
        -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,  
        15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,  
        -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,  
        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);  
      
    function base64encode(str) {  
        var out, i, len;  
        var c1, c2, c3;  
      
        len = str.length;  
        i = 0;  
        out = "";  
        while(i < len) {  
        c1 = str.charCodeAt(i++) & 0xff;  
        if(i == len)  
        {  
            out += base64EncodeChars.charAt(c1 >> 2);  
            out += base64EncodeChars.charAt((c1 & 0x3) << 4);  
            out += "==";  
            break;  
        }  
        c2 = str.charCodeAt(i++);  
        if(i == len)  
        {  
            out += base64EncodeChars.charAt(c1 >> 2);  
            out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));  
            out += base64EncodeChars.charAt((c2 & 0xF) << 2);  
            out += "=";  
            break;  
        }  
        c3 = str.charCodeAt(i++);  
        out += base64EncodeChars.charAt(c1 >> 2);  
        out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));  
        out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));  
        out += base64EncodeChars.charAt(c3 & 0x3F);  
        }  
        return out;  
    }  
      
    function base64decode(str) {  
        var c1, c2, c3, c4;  
        var i, len, out;  
      
        len = str.length;  
        i = 0;  
        out = "";  
        while(i < len) {  
        /* c1 */  
        do {  
            c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];  
        } while(i < len && c1 == -1);  
        if(c1 == -1)  
            break;  
      
        /* c2 */  
        do {  
            c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];  
        } while(i < len && c2 == -1);  
        if(c2 == -1)  
            break;  
      
        out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));  
      
        /* c3 */  
        do {  
            c3 = str.charCodeAt(i++) & 0xff;  
            if(c3 == 61)  
            return out;  
            c3 = base64DecodeChars[c3];  
        } while(i < len && c3 == -1);  
        if(c3 == -1)  
            break;  
      
        out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));  
      
        /* c4 */  
        do {  
            c4 = str.charCodeAt(i++) & 0xff;  
            if(c4 == 61)  
            return out;  
            c4 = base64DecodeChars[c4];  
        } while(i < len && c4 == -1);  
        if(c4 == -1)  
            break;  
        out += String.fromCharCode(((c3 & 0x03) << 6) | c4);  
        }  
        return out;  
    }  
      
    function utf16to8(str) {  
        var out, i, len, c;  
      
        out = "";  
        len = str.length;  
        for(i = 0; i < len; i++) {  
        c = str.charCodeAt(i);  
        if ((c >= 0x0001) && (c <= 0x007F)) {  
            out += str.charAt(i);  
        } else if (c > 0x07FF) {  
            out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));  
            out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));  
            out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));  
        } else {  
            out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));  
            out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));  
        }  
        }  
        return out;  
    }  
      
    function utf8to16(str) {  
        var out, i, len, c;  
        var char2, char3;  
      
        out = "";  
        len = str.length;  
        i = 0;  
        while(i < len) {  
        c = str.charCodeAt(i++);  
        switch(c >> 4)  
        {   
          case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:  
            // 0xxxxxxx  
            out += str.charAt(i-1);  
            break;  
          case 12: case 13:  
            // 110x xxxx   10xx xxxx  
            char2 = str.charCodeAt(i++);  
            out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));  
            break;  
          case 14:  
            // 1110 xxxx  10xx xxxx  10xx xxxx  
            char2 = str.charCodeAt(i++);  
            char3 = str.charCodeAt(i++);  
            out += String.fromCharCode(((c & 0x0F) << 12) |  
                           ((char2 & 0x3F) << 6) |  
                           ((char3 & 0x3F) << 0));  
            break;  
        }  
        }  
      
        return out;  
    }  
      
    function CharToHex(str) {  
        var out, i, len, c, h;  
      
        out = "";  
        len = str.length;  
        i = 0;  
        while(i < len)   
        {  
            c = str.charCodeAt(i++);  
            h = c.toString(16);  
            if(h.length < 2)  
                h = "0" + h;  
              
            out += "\\x" + h + " ";  
            if(i > 0 && i % 8 == 0)  
                out += "\r\n";  
        }  
      
        return out;  
    }  